"I never said there was no collusion between the campaign – or between people in the campaign," Giuliani said during a tense back and forth with Cuomo.

When Cuomo replied by saying he had said that, Giuliani fired back:

"I said the president of the United States. There is not a single bit of evidence the president of the United States committed the only crime you could commit here: conspired with the Russians to hack the DNC."

Giuliani, a former mayor of New York City, and Cuomo then argued about whether Trump had ever refuted claims anyone on his campaign had an improper relationship with the Russians to win the 2016 election.

"He said he didn't – he didn't say nobody," Giuliani exclaimed. "How would you know that nobody in your campaign . . ."

Cuomo interjected and said: "He actually did say that, Rudy, and then he said 'as far as I know.'"

While lawyer Rudy Giuliani says there is no evidence President Donald Trump colluded with Russians to hack the Democratic National Committee, the president's attorney would not rule out whether someone tied to the campaign might have.